Yeah I also had same question about an plug n play module like on the raspberry pi 2 I bought for that And It was also a forum member that made that, and sold them on the forum.
ok ... I have to build it myself. Since I am not an electric engineer (and I do not speak russian) I do not understand the given schematic. How do I connect the SN74LVC04 in that schematic? Which of these SN74LVC04 is the right one? https://www.distrelec.ch/de/logic-i...4&page=1&origPos=1&origPageSize=25&simi=96.86 or https://www.distrelec.ch/de/logic-i...4&page=2&origPos=2&origPageSize=25&simi=96.85 Thanks for your help patrick
First link (SO-14 package) is the right one. <-- this is SOP-14 package with 1.27mm pitch Second linked one is even tinier (0.65mm pitch.) Braswell SPDIF out goes to "1A" (pin 1). 1Y (pin 2) goes to 2A (pin3), 3A (pin5), and 4A (pin 9). Tie 2Y (pin4), 3Y (pin6), and 4Y (pin8) together to connect to C1 (100nF.) Gnd (Pin 7) goes to ground and Vcc (pin14) goes to 1.8V. I usually recommend people to buy a SOP14 Breakout (e.g., http://www.ebay.com/itm/5pcs-SOP14-SSOP14-SMD-to-DIP-Breakout-Board-0-65-1-27mm-/301427210226 ) board from fleabay or aliexpress to help your circuit layout (if you are not building a custom PCB.) ccs_hello
Inverter serves as a digital buffer. Inverting cascaded by another inverting becomes non-inverting. The second stage has 3 parallel units to gain more driving capability. Bottom-line is this, it's a $0.03 part (in quantity) with 6 unit of inverters, isolating/protecting a $20 - $30 Braswell SoC's SPDIF weak digital output, to drive a SPDIF receiver.
I drawed a schematic in Fritzing: Is that correct? Can I use the 1.8V from Expansion Socket #2 Pin 20?
I soldered the pcb today, but in windows 10 I do not have a spdif in the device manager or in the sound configuration. Do I have to activate the spdif somehow?
The SPDIF Out signal came from HD Codec IC: ALC283, not from Braswell. I would start to check in Audio output selection, if there is an option to pick SPDIF_Out.
It looks like ALC283 internals are mainly running on 3.3V and its SPDIF digital signal is also using 3.3v logic level. Using 3.3V based SPDIF driving system is much easier than the ultra-low 1.8V version.
i have no spdif device in win10 (see screenshot) I did not see where in the bios I could activate spdif. I hope udoo give some advice how to use spdif ... can I use spdif (once it is recognised by windows) without the pcb I soldered?
You can use that buffer board still, just connect the power feed to 3.3V instead of 1.8V. It is a rather standard design to have a buffer. It helps protecting the more $$$ expensive circuit. I.e., a 20-cent buffer IC vs. the cost of the UDOO x86 board (actually $5 ALC283 chip but very hard to replace.) For emergency use, I'm guessing no buffer is an option. ccs_hello
Definitely turn on SPDIF output in BIOS. Reinstall Realtek HD Audio driver. This time, it should also install "Digital Audio" portion of the driver. Go to Realtek HD Audio manager, select "Speaker", choose Digital Output instead of Analog output.
How? In the audio section 4.3.4.2 of the manual I set like this: Audio controller enabled Azalia hdmi codec enabled Mute hda amplifier disabled Where can I enable spdif in bios?
Suggest you open a ticket asking UDOO BIOS firmware designer to tell you the proper configuration. From Internet search, the issue seems to be related to Intel Braswell's HDMI video + "digital audio" output is fighting with Azalia HD "Digital" Output (and HDMI's won.) In some brand's BIOS config, some folks said set On-board Azalia Audio to "Enabled" (not Disabled or Auto) then select "Digital Audio Output" to an option that is NOT HDMI Audio. Quote "Nonetheless I seem to have resolved my issue. How, I do not know. I went in and deleted the drivers for NVidia and reinstalled AGAIN the Realtek drivers, then rebooted. It still auto installed the Nvidia High Def drivers AGIAN without warning after reboot but when I looked in my Playback Devices, SPDIF was now there. " <-- Nvidia is the combined HDMI video+audio
